کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1804741 1024654 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modifications in magnetic anisotropy of M—type strontium hexaferrite crystals by swift heavy ion irradiation.
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Modifications in magnetic anisotropy of M—type strontium hexaferrite crystals by swift heavy ion irradiation.
چکیده انگلیسی

Using vibrating sample magnetometery (VSM) 50 MeV Li3+ ion irradiation effects on magnetic properties of single crystals of SrGaxInyFe12−(x+y)O19 (where x=0, 5, 7, 9; y=0, 0.8, 1.3, 1.0), are reported. The substitution of Ga and In in strontium hexaferrite crystals decreases the value of magnetization sharply, which is attributed to shifting of collinear magnetic order to a non-collinear one. Reduction of magnetization is also explained to be as a result of the occupation of the crystallographic sites of Fe3+ by Ga3+ and In3+. The Li3+ ion irradiation decreases the value of magnetization, irrespective of whether the crystals are Ga–In substituted or unsubstituted crystals of SrFe12O19. The result is interpreted in terms of the occurrence of a paramagnetic doublet in crystals replacing magnetic sextuplet as a result of irradiation. Substitution of Ga–In in Strontium hexaferrite decreases the value of anisotropy constant. Irradiation with Li3+ ions increases the values of anisotropy field for both substituted as well as unsubstituted crystals. Substitution with Ga–In also decreases the Curie temperature (Tc) but the irradiation with Li3+ ions does not affect the curie temperature of either Ga–In substituted or pure SrFe12O19 crystals.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 305, Issue 2, October 2006, Pages 392–402
نویسندگان
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